Glass drawing machine



Sept. 1, 1931. I H. ZEH 20,

GLASS DRAWING MACHINE Filed March 25. 1929 s Sheets-Sheet 1 7 m-l-e o; f

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INVENTOR Sept. 1, 1931. H ZE 1,820,930

GLAS S DRAWING MACHINE Filed March 23, 1929 5 Shaefis-Sheet 2 INVENTOR Sept. 1; 1931. H. ZEH' 1,820,930

GLASS DRAWING MACHINE Filed March 23, 1929 3 Sheets-Sheet 3 INVENTOR Patented Sept. 1 1931 v ,[UNiT'ED ST TES PATENT OFFICE ,nowAn-nznrr, or BELLE vnRnomrEnnsYLvANrA, ASSIGNOR TO WINDOW GLASS MACHINE contrary,- orrrrrssmaera, PENNSYLVANIA, A CORPORATION or NEW "JERSEY GLAS S DRAVING MACHINE I Application' file'd March 23, 1929. Serial No. 349,349.

.This invention relatesgenerally to glass drawing apparatus, and more particularly, to flags used in connection with glass drawing 7 machines, such-as those of the Fourcault type, for deflecting particles of broken glass away from the sheet which is being drawn so thattheywillnot fall into the bath.

In drawing sheet glass, beadsgenerally are formed on;the' edges of the sheet. In the Fo-urca-ult system the sheet is drawn upwardlygthrough afdebiteuse from a bath of molten glass by drawing rolls which extend transversely of and on opposite sides of the sheet. Because. of the beads which are formed on the edges of the sheet, the bodies of the drawing rolls must be made shorter than the width of the sheet, otherwise the rolls would contact only at the beads. The ends of the drawing rolls'are reduced in g diameter so that the beads may pass between them. This leaves openings between the rolls at the edges of the sheet which allow particles of broken glass to fall into the bath thereby resulting in drawing imperfect sheets.

My invention provides flags orshie-lds arranged within the drawing machine adjacent the ends of the drawing rolls in order to prevent the particles from falling into the bath. In ordinary practice, two flags only are needed in each machine but if found desirable more than two may be used. 1

In the accompanying drawings, which illustrate the present preferred embodiment 5' of my. invention, J

Figure 1 is a front elevation of a Fourcault sheet glass drawing machine, certain parts being removed or broken away;

Figure 2 is a horizontal section on the line II-II of Figure 1;

Figure 3 is a vertical section on the line IIIIII'of Figure 2; I I

Figures 4 and 5 are respectively an end elevation and a plan view of the flag; and

Figure 6 is a section on the line VIVI of Figure 5.

Referring to Figures 1 and 2 a Fourcault sheet glassdrawing machine is shown. The glass sheet A is drawn between drawing rolls 2 arranged in the usual manner within a frame 3., The rollers are driven through bevel gears 4 which secured to a shaft 6. The shaft is mounted in brackets 7 secured to the top and bottom of the frame 3. 8 secured thereto which meshes with a bevel gear 9'mounted on a shaft 10 which is driven by any desired means. Flags B are arranged within the machine adjacent the ends of the rollers. i

. The flag B is shown in detail in Figures 2 to 6. As illustrated, it comprises a body portion 11 of sheet metal having two pivoted flaps 12 mounted thereon. The sides of the body portion slope downwardly and outwardlyfrom its center and are braced by a reinforcing strip 13 welded to the body at 14. The body has a recess 15 formed therein through which the edges of the drawn sheet pass. Theflaps 12 are hinged as indicated at 16, and have recesses 17 which are smaller than the recess in the body. The flaps 12 have extensions 12 at their outer edges which substantially close the outer edges of the slots 15in the body portion 11, so as to prevent broken glass from falling into the bath or contacting with the sheet. In Figure 4, the dotted lines indicate the position of the flaps 12 when a sheet is being drawn. The full lines and chain lines indicate how the flaps may be rotated about the pivots 16.

. Each flag is supported by a rod 18 which fits in bosses 19 formed on the flag body. The rod,l8 passes through the upper portion of theflag, as shown in Figure 4, and is mounted for rotation in the front and rear walls 20 and 21 respectively of the glass drawing machine. Relative motion between the rod 18 and the flagB is prevented by a setscrew 22. The rod 18 has a handle 23 which, when, rotated, moves the flag from the full line position to they chain line position indicated in Figure 3. The full lines indicate the operative position of the flag while the chain lines indicate its inoperative position. The flag may-be moved along the rod 18 by loosening the set screw 22. This adjustment is sometimes needed in order to make the openings 15 and 17 in the flag coincide with the line of draw of the sheet.

The shaft 6 has a bevel gear mesh with bevel gears 5 As shown in Figure 2, when a glass sheet is being drawn the flaps 12 contact with the beads 24 formed on the'edges of the sheet. The flaps lie so close to'the edges of the sheet that substantially all of the particlesare deflectedby the sloping flaps and body portions of the shield away. fromthe sheet which is being drawn. If the thickness of the sheet should be varied the flaps open up an amount suflicient to take care of the increased thickness but still prevent glass particles from falling into the bath.

Since the flag is supported by the rotatable rod 18, a wider sheet of glass than that shown in the drawings may be drawn by simply turning the handle 23 to rotate the rod 1 8 and flag B so as to move the slots and 1.7 farther away fromthe edge of the sheet.

I have illustrated and described the presl ent preferred embodiment of my invention.

' It is to be understood, however, that the invention may be otherwise embodied without.

departing from the spirit of the invention or the scope of the following claims.

I claim as my invention:

1. A flag for Fourcault sheetglass drawing machines, comprising a body portion having flaps'pivoted thereto and arranged to deflect particles of glass away from the sheet,

order to dispose it for introducing a bait between the drawing rolls.

3. In combination with a Fouroault sheet glass drawing machine, aflag comprising a body portion having downwardly and outwardly slopingsides, said body portion having a recess provided therein through which a glass sheet may be drawn, and flaps pivot- 1: ed to the body portion and adapted to contact with the edges of the sheet to deflect par ticles therefrom, the outer edges of the flaps having extensions which substantially close the recess in the body portion at the outer 551 edge thereof. 7 r 4. A flag for Fourcau'lt sheet glass drawing machines, comprising a body portion having a slot through which the edge of the sheet can be drawn, flaps pivoted to the body portion and adapted to contact with'the bead formed on the border of the sheet to deflect particles of glass'therefrom, the outer edges of the flaps having extensions which substantially close the slot in said-body portion at 7'5 the outer edge thereof.

5. A flag for Fourcault sheet glass drawing machines, comprising a body having downwardly and outwardly sloping sides and having a recess through which the edge of a glass sheet may be drawn, flaps pivoted to the body and arranged to deflect particles of glass away from the sheet, said flag being supported on a rotatable rod extending forwardly and rearwardly of the machine, and

means for adjusting the flag along the rod to move the flag in accordance with the line of draw of the sheet.

' 6. In combination with a'Fourcault sheet my hand.

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,glass drawing machine having drawing rolls,

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